Menu widget in product woocommerce

Good evening, my problem is that I can not enter a menu widget inside a product page (product) of woocommerce but only in a product category page (product_cat).

I refer to the menu on the right side called “Abbigliamento”:
On this page I can enter: http://www.striplastic.com/?product_cat=abbigliamento
On this page is not possible instead: http://www.striplastic.com/?product=grembiule.
The problem is that in the latter that I need!

http://wordpress.org/extend/plugins/woocommerce/